feat: implement admin API for user and representation management

- Updated UsersPage to fetch users from the new admin endpoint.
- Enhanced user data structure to include 'name' and modified rendering logic.
- Added RepresentationDetailPage for detailed representation management.
- Created AdminApiController to handle user and representation CRUD operations.
- Implemented pagination and search functionality for users and representations.
- Updated user and representation data models to reflect new API structure.

assets/admin/App.tsx

@@ -16,6 +16,7 @@ import PaymentsPage from './pages/PaymentsPage';
 import PaymentDetailPage from './pages/PaymentDetailPage';
 import SettlementsPage from './pages/SettlementsPage';
 import RepresentationsPage from './pages/RepresentationsPage';
+import RepresentationDetailPage from './pages/RepresentationDetailPage';
 import CommentsPage from './pages/CommentsPage';
 import RatingsPage from './pages/RatingsPage';
 import SmsPage from './pages/SmsPage';
@@ -81,6 +82,7 @@ export default function App() {
 
         {/* Representations */}
         <Route path="representations" element={<RepresentationsPage />} />
+        <Route path="representations/:uuid" element={<RepresentationDetailPage />} />
 
         {/* Comments & Ratings */}
         <Route path="comments" element={<CommentsPage />} />